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Ksivusya [100]
2 years ago
15

Hydrogen forms _____ bonds with strongly _______ element

Chemistry
1 answer:
jasenka [17]2 years ago
6 0

Answer:

Hydrogen bond is formed only by the three highly electronegative elements- fluorine, oxygen and nitrogen.

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A student was assigned to take water samples from a lake his home . He measured the pH of one of the water samples to be 6.0 . W
Vinvika [58]

Answer: I'm guessing but I think this is the answer and also what I put in mine sorry if wrong

Explanation: I think it's "B.- Slightly Acidic" srry if it's too late-

8 0
3 years ago
Na+CL2=2NACL is the balanced reaction for the formation of table salt. Given 20 grams of Na and 10 grams of Cl2, which reactant
Elina [12.6K]

Excess reactant : Na

NaCl produced : = 16.497 g

<h3>Further explanation</h3>

Given

Reaction(balanced)

2Na + Cl₂⇒ 2NaCl

20 g Na

10 g Cl₂

Required

Excess reactant

NaCl produced

Solution

mol Na(Ar = 23 g/mol) :

= 20 : 23 = 0.87

mol Cl₂(MW=71 g/mol):

= 10 : 71 g/mol = 0.141

mol : coefficient :

Na = 0.87 : 2 = 0.435

Cl₂ = 0.141 : 1 = 0.141

Limiting reactant : Cl₂(smaller ratio)

Excess reactant : Na

Mol NaCl based on mol Cl₂, so mol NaCl :

= 2/1 x mol Cl₂

= 2/1 x 0.141

= 0.282

Mass NaCl :

= 0.282 x 58.5 g/mol

= 16.497 g

4 0
3 years ago
Calculate the mass of 0.0455 mol of Ni
Lera25 [3.4K]

Answer:

2.67g Ni

Explanation:

To convert from moles to mass, use molar mass as a conversion factor.

Nickel has a molar mass of 58.69g/mol.

0.0455mol (\frac{58.69g Ni}{1 mole Ni}) = 2.67g Ni

8 0
3 years ago
A student determines the aluminum content of a solution by first precipitating it as aluminum hydroxide, and then decomposing th
Vladimir [108]

Answer: The student should obtain <u>1.103 g of aluminum oxide </u>

Explanation:

  • First we write down the equations that represent the aluminum hydroxide precipitation  from the reaction between the aluminum nitrate and the sodium hydroxide:

Al(NO3)3 + 3NaOH → 3NaNO3 + Al(OH)3

Now,  the equation that represents the decomposition of the hydroxide to aluminum oxide by heating it.

2Al(OH)3 → Al2O3 + 3H2O

  • Second, we gather the information what we are going to use in our calculations.

Volumen of  Al(NO3)3 = 40mL

Molar concentration of Al(NO3)3 =  0.541M

Molecular Weight Al2O3 = 101.96 g/mol

  • Third, we start using the molar concentration of the aluminum nitrate and volume used to find out the total amount of moles that are reacting

\frac{0.541moles Al(NO3)3}{1L} x\frac{1L}{1000mL} x 40mL Al(NO3)3 =  0.022moles Al(NO3)3

then we use the molar coefficients from the  equations to discover the amount of Al2O3  moles produced

0.022moles Al(NO3)3 x \frac{1mol Al(OH)3}{1mol Al(NO3)3} X\frac{1mol Al2O3}{2molAl(OH)3} = 0.011 moles Al2O3

finally, we use the molecular weight of the Al2O3  to calculate the final mass produced.

0.011moles Al2O3 x \frac{101.96g Al2O3}{1mol Al2O3} = 1.103g Al2O3

4 0
4 years ago
Ordena de mayor a menor según sus radios iónicos a los siguientes iones:
I am Lyosha [343]

Answer:

The correct order of the elements, taking into account their ionic radius from highest to lowest, is:

<em>a) Cl⁻¹ > F⁻¹ > Na⁺¹ > Mg⁺²</em>

<em>b) S⁻² > O⁻² > Li⁺¹ > Be⁺²</em>

<em>c) S⁻² > Cl⁻¹ > K⁺¹ > Na⁺¹</em>

Explanation:

In ions the ionic radius is determined by the amount of electrons an element gains or loses to become an ion.  The more negative an ion is, the greater its ionic radius.

As a rule, anions (negative charge) have a larger ionic radius than cations (positive charge), because the loss of electrons means a contraction of the ionic radius, while the gain of electrons means a greater radius.

To determine which ionic radius is greater in anions or cations with the same charge, it must be considered that in the periodic table the ionic radius increases from top to bottom and from right to left.

Learn more:

Ionic radius example brainly.com/question/2279609

3 0
3 years ago
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